Polycom SIP 3.1 Administrator's Manual page 124

Administrator's Guide SoundPoint IP / SoundStation IP
Note
4 - 70
reg.1.server.1.transport="UDPOnly"
reg.1.server.2.address="172.23.0.150"
reg.1.server.2.port="5075"
reg.1.server.2.transport="UDPOnly"
When the static DNS cache is used, the sip.cfg configuration would look as
follows:
reg.1.address="1001"
reg.1.server.1.address="sipserver.example.com"
reg.1.server.1.port="5075"
reg.1.server.1.transport="UDPOnly"
reg.1.server.2.address=""
reg.1.server.2.port=""
reg.1.server.2.transport=""
dns.cache.A.1.name="sipserver.example.com"
dns.cache.A.1.ttl="3600"
dns.cache.A.1.address="172.23.0.140"
dns.cache.A.2.name="sipserver.example.com"
dns.cache.A.2.ttl="3600"
dns.cache.A.2.address="172.23.0.150"
Above addresses are presented to SIP application in order, for example,
dns.cache.A.1, dns.cache.A.2, and so on.
Example 2
This example shows how to configure static DNS cache where your DNS
provides A records for server.X.address but not SRV. In this case, the static
DNS cache on the phone provides SRV records. For more information, go to
http://tools.ietf.org/html/rfc3263
When the static DNS cache is not used, the sip.cfg configuration would look
as follows:
reg.1.address="1002@sipserver.example.com"
reg.1.server.1.address="primary.sipserver.example.com"
reg.1.server.1.port="5075"
reg.1.server.1.transport="UDPOnly"
reg.1.server.2.address="secondary.sipserver.example.com"
reg.1.server.2.port="5075"
reg.1.server.2.transport="UDPOnly"
When the static DNS cache is used, the sip.cfg configuration would look as
follows:
reg.1.address="1002"
reg.1.server.1.address="sipserver.example.com"
reg.1.server.1.port=""
reg.1.server.1.transport="UDPOnly"
.